Dear Benoît
Am 14.08.2012 23:25, schrieb Benoît Thébaudeau:
Clean up mx25 lowlevel_init:
- Add comments.
- Do not use write32 repeatedly with the same value in order no to increase
code size.
- Make register values configurable.
- Use defined values instead of literal constants.
- Use defined macros instead of duplicating code.
Signed-off-by: Benoît Thébaudeau <benoit.thebaud...@advansee.com>
Cc: Stefano Babic <sba...@denx.de>
---
.../arch/arm/include/asm/arch-mx25/macro.h | 57 +++++++++++++-------
.../board/karo/tx25/lowlevel_init.S | 37 +++----------
.../board/syteco/zmx25/lowlevel_init.S | 6 +++
3 files changed, 51 insertions(+), 49 deletions(-)
diff --git u-boot-4d3c95f.orig/arch/arm/include/asm/arch-mx25/macro.h
u-boot-4d3c95f/arch/arm/include/asm/arch-mx25/macro.h
index 3b694da..9550ade 100644
--- u-boot-4d3c95f.orig/arch/arm/include/asm/arch-mx25/macro.h
+++ u-boot-4d3c95f/arch/arm/include/asm/arch-mx25/macro.h
@@ -32,32 +32,49 @@
#include <asm/arch/imx-regs.h>
#include <generated/asm-offsets.h>
+#include <asm/macro.h>
+/*
+ * AIPS setup - Only setup MPROTx registers.
+ * The PACR default values are good.
+ */
.macro init_aips
- write32 IMX_AIPS1_BASE + AIPS_MPR_0_7, 0x77777777
- write32 IMX_AIPS1_BASE + AIPS_MPR_8_15, 0x77777777
- write32 IMX_AIPS2_BASE + AIPS_MPR_0_7, 0x77777777
- write32 IMX_AIPS2_BASE + AIPS_MPR_8_15, 0x77777777
+ ldr r0, =IMX_AIPS1_BASE
+ ldr r1, =AIPS_MPR_CONFIG
+ str r1, [r0, #AIPS_MPR_0_7]
+ str r1, [r0, #AIPS_MPR_8_15]
+ ldr r2, =IMX_AIPS2_BASE
+ str r1, [r2, #AIPS_MPR_0_7]
+ str r1, [r2, #AIPS_MPR_8_15]
.endm
+/* MAX (Multi-Layer AHB Crossbar Switch) setup */
.macro init_max
- write32 IMX_MAX_BASE + MAX_MPR0, 0x43210
- write32 IMX_MAX_BASE + MAX_MPR1, 0x43210
- write32 IMX_MAX_BASE + MAX_MPR2, 0x43210
- write32 IMX_MAX_BASE + MAX_MPR3, 0x43210
- write32 IMX_MAX_BASE + MAX_MPR4, 0x43210
-
- write32 IMX_MAX_BASE + MAX_SGPCR0, 0x10
- write32 IMX_MAX_BASE + MAX_SGPCR1, 0x10
- write32 IMX_MAX_BASE + MAX_SGPCR2, 0x10
- write32 IMX_MAX_BASE + MAX_SGPCR3, 0x10
- write32 IMX_MAX_BASE + MAX_SGPCR4, 0x10
+ ldr r0, =IMX_MAX_BASE
+ ldr r1, =MAX_MPR_CONFIG
+ str r1, [r0, #MAX_MPR0] /* for S0 */
+ str r1, [r0, #MAX_MPR1] /* for S1 */
+ str r1, [r0, #MAX_MPR2] /* for S2 */
+ str r1, [r0, #MAX_MPR3] /* for S3 */
+ str r1, [r0, #MAX_MPR4] /* for S4 */
+ ldr r1, =MAX_SGPCR_CONFIG
+ str r1, [r0, #MAX_SGPCR0] /* for S0 */
+ str r1, [r0, #MAX_SGPCR1] /* for S1 */
+ str r1, [r0, #MAX_SGPCR2] /* for S2 */
+ str r1, [r0, #MAX_SGPCR3] /* for S3 */
+ str r1, [r0, #MAX_SGPCR4] /* for S4 */
+ ldr r1, =MAX_MGPCR_CONFIG
+ str r1, [r0, #MAX_MGPCR0] /* for M0 */
+ str r1, [r0, #MAX_MGPCR1] /* for M1 */
+ str r1, [r0, #MAX_MGPCR2] /* for M2 */
+ str r1, [r0, #MAX_MGPCR3] /* for M3 */
+ str r1, [r0, #MAX_MGPCR4] /* for M4 */
+.endm
- write32 IMX_MAX_BASE + MAX_MGPCR0, 0x0
- write32 IMX_MAX_BASE + MAX_MGPCR1, 0x0
- write32 IMX_MAX_BASE + MAX_MGPCR2, 0x0
- write32 IMX_MAX_BASE + MAX_MGPCR3, 0x0
- write32 IMX_MAX_BASE + MAX_MGPCR4, 0x0
+/* M3IF setup */
+.macro init_m3if
+ /* M3IF Control Register (M3IFCTL) */
+ write32 IMX_M3IF_CTRL_BASE, M3IFCTL_CONFIG
.endm
#endif /* __ASSEMBLY__ */
diff --git u-boot-4d3c95f.orig/board/karo/tx25/lowlevel_init.S
u-boot-4d3c95f/board/karo/tx25/lowlevel_init.S
index 823df10..cdd9bda 100644
--- u-boot-4d3c95f.orig/board/karo/tx25/lowlevel_init.S
+++ u-boot-4d3c95f/board/karo/tx25/lowlevel_init.S
@@ -23,36 +23,13 @@
#include <asm/macro.h>
-.macro init_aips
- write32 0x43f00000, 0x77777777
- write32 0x43f00004, 0x77777777
- write32 0x43f00000, 0x77777777
- write32 0x53f00004, 0x77777777
-.endm
+#define AIPS_MPR_CONFIG 0x77777777
+#define MAX_MPR_CONFIG 0x43210
+#define MAX_SGPCR_CONFIG 0x10
+#define MAX_MGPCR_CONFIG 0x0
+#define M3IFCTL_CONFIG 0x1
I think it would be nicer if the init_max macro can get these values as
parameters and not as define which has to be there before including the
header file. You could even use default arguments so that the macro can
be used without any argument in the default case. What do you think?
-.macro init_max
- write32 0x43f04000, 0x43210
- write32 0x43f04100, 0x43210
- write32 0x43f04200, 0x43210
- write32 0x43f04300, 0x43210
- write32 0x43f04400, 0x43210
-
- write32 0x43f04010, 0x10
- write32 0x43f04110, 0x10
- write32 0x43f04210, 0x10
- write32 0x43f04310, 0x10
- write32 0x43f04410, 0x10
-
- write32 0x43f04800, 0x0
- write32 0x43f04900, 0x0
- write32 0x43f04a00, 0x0
- write32 0x43f04b00, 0x0
- write32 0x43f04c00, 0x0
-.endm
-
-.macro init_m3if
- write32 0xb8003000, 0x1
-.endm
+#include <asm/arch/macro.h>
.macro init_clocks
/*
@@ -64,6 +41,8 @@
* 0x00600000 makes CLKO parent clk the USB clk
*/
write32 0x53f80064, 0x45600000
+
+ /* CCTL: ARM = 399 MHz, AHB = 133 MHz */
write32 0x53f80008, 0x20034000
/*
diff --git u-boot-4d3c95f.orig/board/syteco/zmx25/lowlevel_init.S
u-boot-4d3c95f/board/syteco/zmx25/lowlevel_init.S
index 1002674..575755c 100644
--- u-boot-4d3c95f.orig/board/syteco/zmx25/lowlevel_init.S
+++ u-boot-4d3c95f/board/syteco/zmx25/lowlevel_init.S
@@ -25,6 +25,12 @@
*/
#include <asm/macro.h>
+
+#define AIPS_MPR_CONFIG 0x77777777
+#define MAX_MPR_CONFIG 0x43210
+#define MAX_SGPCR_CONFIG 0x10
+#define MAX_MGPCR_CONFIG 0x0
+
#include <asm/arch/macro.h>
#include <asm/arch/imx-regs.h>
#include <generated/asm-offsets.h>
I didn't build and run this but from a functional point it looks good.
BTW:
It would be nice if you put the maintainer of a changed file on CC. I
didn't check the ML all the time and maybe missed this change.
Regards
Matthias
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